Graphical user interface for a portion of a display screen



FIG. 1 is a front view of a user interface for a portion of a display screen showing our new design; and,

FIG. 2 is an enlarged view of a portion of FIG. 1 including the claimed region.

The broken line rectangles and the unshaded areas there within form no part of the claimed design. The broken line showing of a display screen and text is included for the purpose of illustrating environment and forms no part of the claimed design. 

The ornamental design for a graphical user interface for a portion of a display screen, as shown and described. 